If you don't apply within the correct timeframe for a review of a general employment matter your application won't be accepted, unless there are exceptional circumstances. A promotion review CANNOT be accepted outside the time frames, in any circumstance.

Sometimes employees want review of actions that occurred over a long period of time and not all are within the relevant timeframe. To conduct a review that meaningfully addresses the employee's concerns, you may need to consider the process that led to the actions that are in time.